wx: add Connect parts to the Edit menu

Third editing op in the wx GUI. No core change — app::connect_parts was already
extracted and unit-tested; this is pure wiring. Edit ▸ Connect parts… picks two
parts (PickPart twice, now caption-parameterised to label "first/second part"),
derives their parent modules from Part::prnt, calls app::connect_parts and
renders the same outcomes the TUI does: refused / identity NC fill / connected
(N wires) / failed.

wx builds clean, window opens with no asserts; tui + tests unaffected.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/frontends/wx/wx_frame.cpp

@@ -2,6 +2,7 @@
 
 #include "frontends/wx/wx_frontend.hpp"
 
+#include "core/app/connect.hpp"
 #include "core/app/edit.hpp"
 #include "core/app/export.hpp"
 #include "core/app/load.hpp"
@@ -34,6 +35,7 @@ enum {
     ID_EXPORT,
     ID_SET_CONNECTOR_TYPE,
     ID_ATTACH_BSDL,
+    ID_CONNECT,
     ID_VERIFY,
     ID_QUIT,
     ID_ABOUT,
@@ -59,6 +61,8 @@ EssimFrame::EssimFrame(WxFrontend &fe)
     auto *edit = new wxMenu;
     edit->Append(ID_SET_CONNECTOR_TYPE, "Set &connector type…\tCtrl-T");
     edit->Append(ID_ATTACH_BSDL, "Attach &BSDL…\tCtrl-B");
+    edit->AppendSeparator();
+    edit->Append(ID_CONNECT, "C&onnect parts…\tCtrl-O");
 
     auto *sysm = new wxMenu;
     sysm->Append(ID_VERIFY, "&Verify\tCtrl-K");
@@ -103,6 +107,7 @@ EssimFrame::EssimFrame(WxFrontend &fe)
     Bind(wxEVT_MENU, &EssimFrame::OnExport,  this, ID_EXPORT);
     Bind(wxEVT_MENU, &EssimFrame::OnSetConnectorType, this, ID_SET_CONNECTOR_TYPE);
     Bind(wxEVT_MENU, &EssimFrame::OnAttachBsdl, this, ID_ATTACH_BSDL);
+    Bind(wxEVT_MENU, &EssimFrame::OnConnect, this, ID_CONNECT);
     Bind(wxEVT_MENU, &EssimFrame::OnVerify,  this, ID_VERIFY);
     Bind(wxEVT_MENU, &EssimFrame::OnQuit,    this, ID_QUIT);
     Bind(wxEVT_MENU, &EssimFrame::OnAbout,   this, ID_ABOUT);
@@ -256,10 +261,10 @@ void EssimFrame::OnExport(wxCommandEvent &) {
     }
 }
 
-Part *EssimFrame::PickPart() {
+Part *EssimFrame::PickPart(const wxString &caption) {
     System *sys = fe_.system();
     if (!sys || sys->modules()->size() == 0) {
-        wxMessageBox("No modules loaded.", "Select part",
+        wxMessageBox("No modules loaded.", caption,
                      wxOK | wxICON_INFORMATION, this);
         return nullptr;
     }
@@ -269,12 +274,12 @@ Part *EssimFrame::PickPart() {
     std::sort(mods.begin(), mods.end());
     wxArrayString mchoices;
     for (const auto &m : mods) mchoices.Add(wx(m));
-    int mi = wxGetSingleChoiceIndex("Module:", "Select part", mchoices, this);
+    int mi = wxGetSingleChoiceIndex("Module:", caption, mchoices, this);
     if (mi < 0) return nullptr;
     Module *m = sys->modules()->get(mods[mi]);
 
     if (m->size() == 0) {
-        wxMessageBox("That module has no parts.", "Select part",
+        wxMessageBox("That module has no parts.", caption,
                      wxOK | wxICON_INFORMATION, this);
         return nullptr;
     }
@@ -283,7 +288,7 @@ Part *EssimFrame::PickPart() {
     std::sort(parts.begin(), parts.end());
     wxArrayString pchoices;
     for (const auto &p : parts) pchoices.Add(wx(p));
-    int pi = wxGetSingleChoiceIndex("Part:", "Select part", pchoices, this);
+    int pi = wxGetSingleChoiceIndex("Part:", caption, pchoices, this);
     if (pi < 0) return nullptr;
     return m->get(parts[pi]);
 }
@@ -336,6 +341,43 @@ void EssimFrame::OnAttachBsdl(wxCommandEvent &) {
     RebuildModelView();
 }
 
+void EssimFrame::OnConnect(wxCommandEvent &) {
+    Part *p1 = PickPart("Connect — first part");
+    if (!p1) return;
+    Part *p2 = PickPart("Connect — second part");
+    if (!p2) return;
+    if (p1 == p2) {
+        wxMessageBox("Pick two different parts.", "Connect",
+                     wxOK | wxICON_INFORMATION, this);
+        return;
+    }
+
+    // m1/m2 are the parts' parent modules — connect_parts needs them for the
+    // Connection name and ownership.
+    app::ConnectResult r =
+        app::connect_parts(fe_.system(), p1->prnt, p1, p2->prnt, p2);
+
+    if (r.refused) {
+        Log("connect refused: " + wx(r.error));
+        wxMessageBox(wx(r.error), "Connect refused", wxOK | wxICON_ERROR, this);
+        return;
+    }
+    if (!r.identity_info.empty()) {
+        Log("connect: " + wx(r.identity_info));
+        if (r.nc_added > 0)
+            Log(wxString::Format("connect: added %d NC pin(s) so both sides match",
+                                 r.nc_added));
+    }
+    if (r.ok) {
+        Log(wxString::Format("connected: %s  via %s (%d wires)",
+                             wx(r.connection_name), wx(r.transform_name), r.wires));
+    } else {
+        Log("connect failed: " + wx(r.error));
+        wxMessageBox(wx(r.error), "Connect failed", wxOK | wxICON_ERROR, this);
+    }
+    RebuildModelView();
+}
+
 void EssimFrame::OnVerify(wxCommandEvent &) {
     app::VerifyReport r = app::verify(fe_.system());
 

src/frontends/wx/wx_frame.hpp

@@ -24,13 +24,15 @@ private:
     void OnExport(wxCommandEvent &);
     void OnSetConnectorType(wxCommandEvent &);
     void OnAttachBsdl(wxCommandEvent &);
+    void OnConnect(wxCommandEvent &);
     void OnVerify(wxCommandEvent &);
     void OnQuit(wxCommandEvent &);
     void OnAbout(wxCommandEvent &);
 
     // Prompt the user to pick a module then a part from the current System.
-    // Returns nullptr if there is nothing to pick or the user cancels.
+    // `caption` titles the dialogs (e.g. to distinguish two picks). Returns
-    class Part *PickPart();
+    // nullptr if there is nothing to pick or the user cancels.
+    class Part *PickPart(const wxString &caption = "Select part");
 
     void RebuildModelView();          ///< refresh tree + overview from the System
     void Log(const wxString &line);   ///< append a line to the log pane